Home/ Questions/Q 8930413
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-06-15T08:53:15+00:00

I`m consuming asp.net web api in my android app. But it gives me an

  • 0

I`m consuming asp.net web api in my android app. But it gives me an error. my returning string is in JSON format.
below is my log cat

11-30 12:44:02.760: W/ActivityThread(821): Application com.example.test is waiting for the debugger on port 8100...
11-30 12:44:02.811: I/System.out(821): Sending WAIT chunk
11-30 12:44:02.820: I/dalvikvm(821): Debugger is active
11-30 12:44:02.900: I/System.out(821): Debugger has connected
11-30 12:44:02.900: I/System.out(821): waiting for debugger to settle...
11-30 12:44:03.099: I/System.out(821): waiting for debugger to settle...
11-30 12:44:03.299: I/System.out(821): waiting for debugger to settle...
11-30 12:44:03.509: I/System.out(821): waiting for debugger to settle...
11-30 12:44:03.709: I/System.out(821): waiting for debugger to settle...
11-30 12:44:03.910: I/System.out(821): waiting for debugger to settle...
11-30 12:44:04.113: I/System.out(821): waiting for debugger to settle...
11-30 12:44:04.319: I/System.out(821): waiting for debugger to settle...
11-30 12:44:04.519: I/System.out(821): waiting for debugger to settle...
11-30 12:44:04.721: I/System.out(821): waiting for debugger to settle...
11-30 12:44:04.930: I/System.out(821): debugger has settled (1324)
11-30 12:46:27.210: E/log_tag(821): Error converting result org.json.JSONException: Value [{"Name":"Panadol","Batch":"B030","Id":1,"Expiry":"12\/11\/2013","Type":"Tablet","Price":"12"},{"Name":"Velosef 500mg","Batch":"B069","Id":2,"Expiry":"06\/12\/2014","Type":"Capsule","Price":"100"},{"Name":"Tandegyl 120ml","Batch":"B097","Id":3,"Expiry":"09\/08\/2015","Type":"Syrup","Price":"120"},{"Name":"Acefyl","Batch":"B78","Id":4,"Expiry":"03\/12\/2014","Type":"Syrup","Price":"50"},{"Name":"Tyno","Batch":"B79","Id":5,"Expiry":"03\/06\/2015","Type":"Syrup","Price":"48"},{"Name":"Nocid 40mg","Batch":"BN09","Id":6,"Expiry":"11\/09\/2013","Type":"Tablet","Price":"60"},{"Name":"Lipiget 100mg","Batch":"B090","Id":7,"Expiry":"09\/09\/2015","Type":"Tablet","Price":"250"}] of type org.json.JSONArray cannot be converted to JSONObject
11-30 12:46:42.319: D/dalvikvm(821): Debugger has detached; object registry had 498 entries
11-30 12:46:42.333: I/dalvikvm(821): ignoring registerObject request in thread=1
11-30 12:46:42.333: I/dalvikvm(821): ignoring registerObject request in thread=1
11-30 12:46:42.333: D/AndroidRuntime(821): Shutting down VM
11-30 12:46:42.333: W/dalvikvm(821): threadid=1: thread exiting with uncaught exception (group=0x40015560)
11-30 12:46:42.399: E/AndroidRuntime(821): FATAL EXCEPTION: main
11-30 12:46:42.399: E/AndroidRuntime(821): java.lang.NullPointerException
11-30 12:46:42.399: E/AndroidRuntime(821):  at com.example.test.Test$1$1$1.run(Test.java:63)
11-30 12:46:42.399: E/AndroidRuntime(821):  at android.os.Handler.handleCallback(Handler.java:587)
11-30 12:46:42.399: E/AndroidRuntime(821):  at android.os.Handler.dispatchMessage(Handler.java:92)
11-30 12:46:42.399: E/AndroidRuntime(821):  at android.os.Looper.loop(Looper.java:123)
11-30 12:46:42.399: E/AndroidRuntime(821):  at android.app.ActivityThread.main(ActivityThread.java:3683)
11-30 12:46:42.399: E/AndroidRuntime(821):  at java.lang.reflect.Method.invokeNative(Native Method)
11-30 12:46:42.399: E/AndroidRuntime(821):  at java.lang.reflect.Method.invoke(Method.java:507)
11-30 12:46:42.399: E/AndroidRuntime(821):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
11-30 12:46:42.399: E/AndroidRuntime(821):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
11-30 12:46:42.399: E/AndroidRuntime(821):  at dalvik.system.NativeStart.main(Native Method)

and here is my test class
Test.java

package com.example.test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.ArrayList;
import java.util.List;

import org.json.JSONException;
import org.json.JSONObject;
import android.os.Bundle;
import android.os.Handler;
import android.os.StrictMode;
import android.app.Activity;
import android.util.Log;
import android.view.View;
import android.widget.AutoCompleteTextView;
import android.widget.Button;

public class Test extends Activity {

    AutoCompleteTextView acw;
    Button click;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);

        StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
        StrictMode.setThreadPolicy(policy); 

        acw=(AutoCompleteTextView)findViewById(R.id.AndroidBooks);
        click=(Button)findViewById(R.id.button1);

        final Handler threadHandler;  
        threadHandler = new Handler();

        new Thread(new Runnable(){

            @Override
            public void run() {

                final String url="http://10.0.2.2:3325/api/ProductType";

                click.setOnClickListener(new View.OnClickListener() {

                    @Override
                    public void onClick(View v) {

                        threadHandler.post(new Runnable(){

                            @Override
                            public void run() {

                                List<String> temp=new ArrayList<String>();

                                try {
                                    JSONObject json=executeGet(url);
                                    Log.v("Response", json.toString());
                                } catch (JSONException e) {

                                    e.printStackTrace();
                                }

                            }

                        });

                    }
                });

            }

        }).start();
    }

    public static JSONObject  executeGet(String url) throws JSONException
    {
        InputStream is = null;
        String result = "";
        JSONObject jArray = null;
        int response=0;
        HttpURLConnection connection = null; 
        try
        {
            connection = (HttpURLConnection) new URL(url).openConnection();
            connection.setDoInput(true);
            connection.setRequestProperty("Content-Type", "application/json");
            connection.setRequestMethod("GET");
            connection.connect();
            response=connection.getResponseCode();
            is=connection.getInputStream();
        } 
        catch(Exception e)
        {
            e.printStackTrace();
            Log.e("HTTP Response", e.toString());
        }
        try
        {
            if(response==200)
            {

                BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"),8);
                StringBuilder sb = new StringBuilder();
                String line = null;

                while ((line = reader.readLine()) != null) {
                    sb.append(line + "\n");
                } 
                is.close();
                result=sb.toString();

                jArray = new JSONObject(result);
            }

        }
        catch (IOException e) {
            e.printStackTrace();
        }
        catch(Exception e)
        {
            Log.e("log_tag", "Error converting result "+e.toString());
        }

        return jArray;
    }

}

I find on google that data isn`t JSON format. according to my log my data is in JSON format. so whats wrong in the code. i also use UTF-8 encoding. but same issue.

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    You are trying to convert JsonArray to JsonObject so change your code as because in current json string contain an JsonArray instead of JsonObejct as root element:

     try {
      JSONArray jsonarray=executeGet(url);
      for (int i = 0; i < jsonarray.length(); ++i) {
      JSONObject jsonobject = jsonarray.getJSONObject(i);
      String str_name=jsonobject.getString("Name");
      String str_Batch=jsonobject.getString("Batch");
      String str_Id=jsonobject.getString("Id");
      String str_Expiry=jsonobject.getString("Expiry");
      String str_Type=jsonobject.getString("Type");
      String str_Price=jsonobject.getString("Price");

      } catch (JSONException e) {
         e.printStackTrace();
    }

    and also change retrun type of executeGet(String url) method from JsonObject to JSONArray as

    public static JSONArray executeGet(String url) throws JSONException
    • 0